diff --git a/libs/cpu.php b/libs/cpu.php
index 9665c87..993e289 100644
--- a/libs/cpu.php
+++ b/libs/cpu.php
@@ -64,7 +64,7 @@ if ($frequency == 'N.A')
 // CPU Temp
 if ($Config->get('cpu:enable_temperature'))
 {
-    if (exec('/usr/bin/sensors | grep -E "^(CPU Temp|Core 0)" | cut -d \'+\' -f2 | cut -d \'.\' -f1', $t))
+    if (file_exists('/usr/bin/sensors') && exec('/usr/bin/sensors | grep -E "^(CPU Temp|Core 0)" | cut -d \'+\' -f2 | cut -d \'.\' -f1', $t))
     {
         if (isset($t[0]))
             $temp = $t[0].' °C';
@@ -88,4 +88,4 @@ $datas = array(
     'temp'       => $temp,
 );
 
-echo json_encode($datas);
\ No newline at end of file
+echo json_encode($datas);
diff --git a/libs/system.php b/libs/system.php
index 702ef3b..ee43722 100644
--- a/libs/system.php
+++ b/libs/system.php
@@ -6,11 +6,11 @@ date_default_timezone_set(@date_default_timezone_get());
 $hostname = php_uname('n');
 
 // OS
-if (!($os = shell_exec('/usr/bin/lsb_release -ds | cut -d= -f2 | tr -d \'"\'')))
+if (!file_exists('/usr/bin/lsb_release') || !($os = shell_exec('/usr/bin/lsb_release -ds | cut -d= -f2 | tr -d \'"\'')))
 {
-    if (!($os = shell_exec('cat /etc/system-release | cut -d= -f2 | tr -d \'"\'')))
+    if (!file_exists('/etc/system-release') || !($os = shell_exec('cat /etc/system-release | cut -d= -f2 | tr -d \'"\'')))
     {
-        if (!($os = shell_exec('cat /etc/os-release | grep PRETTY_NAME | tail -n 1 | cut -d= -f2 | tr -d \'"\'')))
+        if (!file_exists('/etc/os-release') || !($os = shell_exec('cat /etc/os-release | grep PRETTY_NAME | tail -n 1 | cut -d= -f2 | tr -d \'"\'')))
         {
             if (!($os = shell_exec('find /etc/*-release -type f -exec cat {} \; | grep PRETTY_NAME | tail -n 1 | cut -d= -f2 | tr -d \'"\'')))
             {
@@ -72,4 +72,4 @@ $datas = array(
     'server_date'   => $server_date,
 );
 
-echo json_encode($datas);
\ No newline at end of file
+echo json_encode($datas);